THE EFFECT OF SUNGLASSES AND ALBEDO ON UV LIGHT INTENSITY. Ben Causey, Emma J-R, Alex Smith. This lab tested the effectiveness of UV protective sunglasses and whether or not a snow on the ground increases sunburn. This was simulated through measuring the brightness of UV rays reaction with fluorescent fluid. In the first test, the UV light traveled through only a sunglass lens to see how much light was cutoff. The second part of the lab simulated the albedo of a snow bowl with a bowl of mirrors. The results showed that one pair of sunglasses eliminated 83% of the initial UV light and the second pair eliminated 75% of the light. Therefore UV protective glasses are somewhat, but not fully protective as the label indicates. As for the albedo’s effect, it increased UV light intensity by 61%.
Key terms: Fluorescence, Luminescence, Ultraviolet light, UV-B rays, AV-A rays, Albedo, Spectrometer, Light, Wavelength
Mahach, Karen. A Preliminary Field Evaluation of Ultraviolet-Activated Flourescent Roadway Delineation [Internet]. Federal Highway Administration; [Modified 1997 August].
Brown S S. 2003 [cited 2003 Mar 6].Absorption Spectroscopy in High-Finesse Cavities for Atmospheric Studies. [Internet]. Washington, DC: ACS Publications. Available from: http://pubs.acs.org/doi/abs/10.1021/cr020645c.
Siani A. & Casale G. 2008 [cited 2010 Feb 26].Personal UV exposure in high albedo alpine sites. [Internet]. Atmospheric Chemistry and Physics. Available from: http://www.atmos-chem-phys.net/8/3749/2008/.
Key terms: Fluorescence, Luminescence, Ultraviolet light, UV-B rays, AV-A rays, Albedo, Spectrometer, Light, Wavelength
Sparling, Brien. Educational Resources [Internet]. [Modified 2001 May 30].
Available from: http://www.nas.nasa.gov/About/Education/Ozone/radiation.html.
Helmenstine, Anne. What Materials Glow under Black or UV Light? [Internet]. [Modified 2010].
Available from: http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm.
Mahach, Karen. A Preliminary Field Evaluation of Ultraviolet-Activated Flourescent Roadway Delineation [Internet]. Federal Highway Administration; [Modified 1997 August].
link to Journal: http://www.tfhrc.gov/pubrds/july97/uv.htm
Works Cited
Brown S S. 2003 [cited 2003 Mar 6].Absorption Spectroscopy in High-Finesse Cavities for Atmospheric Studies. [Internet]. Washington, DC: ACS Publications. Available from: http://pubs.acs.org/doi/abs/10.1021/cr020645c.
Siani A. & Casale G. 2008 [cited 2010 Feb 26].Personal UV exposure in high albedo alpine sites. [Internet]. Atmospheric Chemistry and Physics. Available from: http://www.atmos-chem-phys.net/8/3749/2008/.